Phonon Engineering for Nanostructures

摘要: Understanding the physics of phonon transport at small length scales is increasingly important for basic research in nanoelectronics, optoelectronics, nanomechanics, and thermoelectrics. We conducted several studies to develop an understanding behavior very structures. This report describes modeling, experimental, fabrication activities used explore across along material interfaces through nanopatterned Toward interfaces, we computed Kapitza conductance {Sigma}29(001) {Sigma}3(111) silicon, fabricated single-crystal silicon substrates, picosecond laser pulses image thermal waves crossing interfaces. designed a unique differential test structure that can measure proportion specular diffuse scattering from surfaces. Phonon-scale simulation ligaments, as well continuum scale modeling complete experiment, confirmed its sensitivity surface scattering. To further our nanostructures, microscale-patterned structures diamond thin films.